Flavour physics at LHCb

Some selected results of the LHCb experiment, running at the LHC with ppcollisions at 7 TeV and 8 TeV, are reported here, after operation with a total integratedluminosity of 3.0 fb^-1 (Run 1). We focus on the most recent analyses on flavour physics,that include measurements of the CKM invariant phases gamma and beta, precision determination of the quark coupling strength V_ub, observation of the very rare decays B^0_(s)->mu^+mu^-, search for new physics in the anomalous branching ratio of B->D*tauv̄, and precision angular analysis of the rare decays B^0->K*^0mu^+mu^- and B^0_s->phimu^+mu^-. Detailed comparisons are performed in all cases with the predictions of the Standard Model, and a fewinteresting tensions are observed.